/*! =================================
 * 测试中~ 很成功的样子
 */
$color : #000;

body{
  color: $color;
  margin: 0;
  padding: 0;
  .box{
    width: 50px;
    height: 50px;
    border-radius: 5px;
    background: #f8f8f8;
    transition: all .2s ease;
  }
}

.content{
  font-size: 14px;
  margin: 0 auto;
  box-sizing: border-box;
  display: flex;
}

.css{
  font-size: 16px;
}